Archive for 2011

Exposure Compensation

The camera’s metering system will sometimes determine the wrong exposure value needed to correctly expose the image. This can be corrected by the “EV Compensation” feature found in prosumer and professional cameras. Typically the EV compensation ranges from -2.0 EV to +2.0 EV with adjustments in steps of 0.5 or 0.3 EV. Some digital SLRs […]

Exposure

The exposure is the amount of light received by the sensor and is determined by how wide you open the lens diaphragm (aperture) and by how long you keep the sensor exposed (shutterspeed). The effect an exposure has depends on the sensitivity of the sensor (ISO sensitivity). Accredited online photography schools can teach you more […]

Auto Bracketing

Autobracketing is a feature of some more advanced cameras, particularly single-lens reflex cameras (SLR), where the camera will take several successive shots (usually three) with slightly different settings. Later, the best-looking pictures can be picked from the batch. When the photographer achieves the same result by changing the camera settings between each shot, this is […]

Aperture Priority

Aperture priority, often abbreviated Av (for Aperture value) or A on a camera mode dial, is a setting that allows the user to choose a specific aperture value while the camera selects a shutter speed to match. The camera will ensure proper exposure. This is different from manual mode, where the user must decide both […]

Aperture

Aperture refers to the size of the opening in the lens that determines the amount of light falling onto the sensor. The size of the opening is controlled by an adjustable diaphragm of overlapping blades similar to the pupils of our eyes. Aperture affects exposure and depth of field. Successive apertures halve the amount of […]